package controller;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/logout")
public class LoginOutServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 获取当前会话
        HttpSession session = req.getSession();
        if (session == null){
            resp.getWriter().write("用户未登录,无法注销!");
        }
        // 删除会话
        session.removeAttribute("user");
        resp.sendRedirect("login.html");
    }
}
